The principle of PANZHU WRAP Waterproofing Membrane: Waterproof breathable working principle can be divided into two kinds-- microporous and hydrophilic groups, PANZHU WRAP Waterproofing Membrane is using the former. Due to the huge difference of diameter--- the minimum diameter of the water droplets 20 microns and the water vapor only about 0.0004 microns , water vapor can go through the microporous membrane easily.While because of the effect of surface tension, liquid water cannot pass the microporous membrane.Thus prevent the infiltration of water and make the breathable membrane waterproof. Advantages of PANZHU WRAP Waterproofing Membrane: